body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
#basemap-switcher {
    position: absolute;
    bottom: 20px;
    left: 10px;
    z-index: 1;
}

#basemap-toggle-btn {
    background-color: #3388ff;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 14px;
    cursor: pointer;
    box-shadow: 0 0 0 2px rgba(0,0,0,.1);
    width: 70px;
    text-align: center;
}

#basemap-toggle-btn:hover {
    background-color: #4c9aff;
}

#env-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: red;
  color: white;
  text-align: center;
  font-weight: bold;
  padding: 6px;
  z-index: 9999;
  font-family: sans-serif;
}